The device (3) comprises a first duct (14) having a proximal end, associated with a hand-piece (5), and an open distal end (14A). The first duct (14) is in fluid communication with an inlet port (18) for a liquid containing scattering particles. The device (3) furthermore comprises a light guide (7) so arranged and configured as to convey a laser radiation coming from a laser source (11) near the open distal end (14A) of the first duct (14).
